1. Commonly experienced by North American Natives under the influence of alcohol. 'Going nish' often involves this uncontrollable urge to inflict verbal and/or physical pain on an unwitting victim in hopes to meet an unnecessary and meaningless resolve, only to deny that such occurrences ever happened the very next day.

2. to instigate this form of violence while in an inebriated state, with no apparent intent and absolutely no recollection of such actions the following day, primarily due to embarrassment.